Loom-shuttle.



W. P. GAVANAGH.

LOOM SHUTTLE.

APPLICATION FILED M114, 1910.

Patented Aug. 23, 1910.

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WILLIAM ,F. CAVANAGH, OF PROVIDENCE, RHODE ISLAND.

LOOM-SI-IUT'TLE.

Specification of Letters latent' Patented Aug. 23, 1910- .Applic ation filed February 14, 1910. Serial No. 543,798.

To all whom it may concern:

NAGH a citizen of the United States, residingat the city of Providence, in the county of Providence and State of Rhode Island, have invented certain .new and useful improvements in Loom-Shuttles,of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates toshuttles for looms and has for its object to provide a bobbin holder within the shuttle that will first,

greatly reduce the weight of the holder;

second, reduce the first cost of manufacture; third, render dofling quick and easy; fourth,

completely obviate the breaking or splitting of the'bobbins due to the impact of the rapidly reciprocating shuttle, and fifth, reduce to the minimum the waste of yarn due to such breakage.

'By my improved construction I accornplish the very important feature of materially reducing the weight of the shuttle by removing the usual hinged spindle therefrom and also by making the retaining members of special shape and of sheet metal construction.

The usual method of retaining the bobbin in the shuttle is to provide a hinged spindle onto which the bobbin is placed, said spindle may then be swung from its raised or vdoiiing position downward to carrythe bobbin into the shuttle where a catch member is arranged to enter the groovein the head ofthe bobbin for the purpose of retaining the same in position. Owing to the swinging motion, which causes the bobbin to enter the shuttle on the arc of a circle the engaging surface of this catch member is necessarily very limited and therefore, as the bobbin is made of wood, the repeated impacts of the rapidly traveling shuttle, splits and breaks away the wood at the end of the bobbin necc ssitating its removaland also the destruction of the yarn remaining upon it as this bobbin thiis broken can no longer be retained in the shuttle. This is a most serious ditliculty in the use of bobbins of this character which has long sought to be effectively overcome.

By the use of my improved construction I do away with the sprindle and therefore can enter the bobbin into the shuttle at right angles to its axis, by which arrangement I am enabled to provide a retain g member which will enter the'groove in the head of the bobbin, fit closely therein, and engage at least Belt known that I, WILLIAM F. CAVA- one-half of its circular surface, thereby increasing the engaging surface to such an 6X: tent that the breakage or splitting of this head is gntirely obviated or reduced to the minimum. p i 4 Another feature of my invention is that upon being positioned within the shuttle the bobbin is held firmly against its retaining member from any possibility of moving'by the strong tension of a spring pressed re taining bolt. With these and other objectsin view, the invention consists of certain novel features of construction, as will be more fully described and particularly pointed out in the appended claims. Inthe accompanying drawings Figure 1- 1S a perspective View of a shuttle having a bobbin retained therein by my improvedmechanism. Fig. 2 is an enlarged central longitudinal sectional view through the shut- ,tle and through my improved bobbin retainin'g mechanism showing the bobbinin position partly in section. Fig. 8 is aperspective view of the retaining member with the spring bolt mounted therein. Fig. 4 is a detail of the spring bolt removed from the. retaining member. Fig. 5- is a section on line 55 of Fig. 2 looking in the direction of the arrows.

Referring to the drawings, 1 designates the shuttle which may be made in the usual or any desired form. The bobbin 2 may also be made in the usual form, preferably of wood, having an enlarged head portion 3 which is provided with a deep groove 4 for the reception of the flange of the retaining member. In order to provide a retaining device which may be very light in weight,

inexpensive in construction and yet extremely strong and durable I preferably form the same by striking it up from sheet metal, forming a tubular body portion 01'- barrel 5 which extends back into the head of the shuttle, being sufficiently long to profvide a firm support or bearing therein. The forward portion of this member is provided same is positioned within the shuttle. In order to firmly lock this bobbin in position in said engaging member I have provided a pin or bolt 9, see Figs. 2 and i, the outer end or tip of which is preferably formed tapering or conical, as at 10, for the purpose of readily entering the aperture 11 in the bobbin. The body of this pin is preferably formed hollow as at 12 nearly its entire length inward from its rear end, thus reducing its weight and also forming a chamher to receive the coils of the tension spring 13, the outer end of which is arranged to bear against the two locking pins I l which p through the holes 15 near the inner end of the body portion 5.

An operating handle 16 is secured to the locking bolt 9 by riveting or other suitable means, its engaging end. being arranged to extend up through the slotted portion 17 in the tubular body 5, the ends of said slot forming stops to limit the movement of said bolt in either or both directions.

The operation of my improved device may be further described as follows: lVhen it is desired to insert the bobbin into the shuttle it is only necessary for the operator to withdraw the locking bolt 9 by pressing his thumb against the handle 16 carrying said bolt backward against its tension spring 13. The bobbin, which may be of the usual wooden type having the enlarged circularly grooved head, may then be carried directly downward at right angles to the axis of the shuttle into position therein, whereby the semi-circular lip S of the retaining l'iltllllJOl. will enter the groove 4t- 01. said head and engage the walls oi? said groove for approximately one-half the entire circle. It only necessary to now release said bolt 0 which will at once press forward, the tapering point thereof engaging the walls of the central hole in the bobbin forcing said bobbin outward and holding it firmly against v aid retaining lip 8 toresist all shocks due to the impact of the shuttle and also by entering the aperture ll e'tlectually prevents the bobbin from rising. The constant pressure of the locking bolt holding the bobbin in position against its retaining lip, together with the greatly extended engaging area of the head in the grooved portion reduces to the minimum the possibility of breaking away or splitting of the wood to destroy the bobbin from the shocks and strains to which the same is subjected.

Owing to the fact that the rim 7 is substantially semi-circular, said rim having the inwardly turned lip 8 at its edge, the said rim 7 supports one siderot' the head oi the bobbin against lateral pressure, while the inner wall of the lip 8 supports one side of the groove 4 in the bobbin head 3 against outward pressure. The cone tip 10 of the bolt 9 is' formed with a suiiiciently long taper i be firmly secured in place.

or incline so as to positively and firmly hold the bobbin head with portions thereof engaged with said rim and lip in the manner described, without any possibility of time bobbin becoming dislodged. To hold the parts in this engagement as described and to do so with certainty of the bobbin remaining in place, a spring 13 of considerable strength is employed. The bobbin head is not snapped to and from position, and could not practically be so shifted with a spring of such strength as is used, and the cone tip of the bolt is so shaped, that the bobbin will Therefore the operating handle 16 is employed, said handle projecting through the slot 1'? of the tubular barrel I As indicated in the drawings, the circular flange 6 is rigid with the tubular barrel 5, and said flange carries the rim 7 and lip 8. The entire retaining device therefore can be putin place in the shuttle and locked there by the pin or pins 14L, and the relationship of the flange 6 and the rim 7 and lip 8 will always remain the same.

The device is extremely simple and practical in construction, inexpensive to manufacture and etl'ective in operation and by its use the cost of operating the loom due tobreaking of the bobbns and consequent waste of valuable yarn, is greatly reduced. Also by eliminating the spindle and the heavy solid parts connected therewith, replacing the same with light sheet metal construction l have materially reduced the weight oi? the shuttle itself, thereby relieving all of its actuating parts and permitting an increase in the loom speedand coi'isequently its production;

Having thus described my invention, what i claim as=new and desire to secure by Letters Patent, is:

1. [n a loom shuttle, a retaining member provided with a substantially semi-circular rim and a lip, the rim being formed to support one side of a bobbin head and the lip 'being adapted to enter a groove in said bobbin head, and a bolt having a cone tip to enter an aperture in the bobbin to hold the head of the latter in lirm engagement with both the rim and the lip of the retaining member.

2. In a loom shuttle, a rc 'J-aining member provided with a substantially semi-circular rim and a lip, the rim being formed to support one side of a. bobbin head and the lip being adapted to enter a groove in said bobbin head, and a spring pressed bolt having a cone tip to enter an aperture in the bobbin to hold the head of the latter in firm engagement with both the rim and the lip of the retaining member, said bolt hav ing means whereby it may be manually retracted.

3. In a loom shuttle, a retaining member comprising a tubular barrel having a circular flange rigid with one end thereof, said flange having a rim, and the latter having a lip at its edge, and a spring pressed bolt mounted in said barrel and having a coneshaped tip.

4. In a 100m shuttle, a retaining member comprising a tubular barrel having a circular flange rigid with one end thereof, said flange having a rim, and the latter having a lip at its edge, and a spring pressed bolt mounted in said barrel and having a coneshaped tip, the said barrel being formed with a slot, and the bolt having a handle projecting through said slot.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM F. CAVANAGH.

Witnesses HOWARD E. BARLOW, E. I. OGDEN. 

